Samuel s



(No Model.)

S. S.-WALKER.

SHUTTLE CHECK FOR LOOMS.

Patented July 12, 1887.

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UNiTED STATES PATENT EEIcE.

SAMUEL S. \VALKER, OF \VARREN, RHODE ISLAND.

SHUTTLE-CHECK FOR Looms.

SPECIFICATION iorming part of Letters Patent No. 366,358, dated July 12, 1887.

Serial No. $28,485. (No model.)

To (LZZ whom, it may concern."

Be it known that I, SAMUEL S. XVALKER, of \Varren, in the county of Bristol and State of Rhode Island, have invented certain new and useful Improvements in Shuttle-Checks for Looms; and I do hereby declare that the following isa full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to shuttlechecks for looms, and particularly to the springs which serve to press inward the binders in the sides of the shuttle-boxes into position to properly engage with and press upon the shuttle; and the object of the invention is to provide an improved construction which shall be moredurable than those constructions heretofore in use.

The invention willfirst be described in connection with the accompanying drawings, and then be defined in the claim at the end of the specification.

Figure 1 shows a part of a loomin vertical crosssection, taken through the line a x in Figs. 2 and 3, only those parts of the loom being shown that will assist in explaining the r is the binder in the side of the shuttlebox, and 0 is the finger that presses against the binder. This finger 0 is secured by means of a sct-screw to the rod a, which is held free to turn in bearings attached to the side or bottom of the lathe. The binder-spring c is coiled around the rod a and has one end inserted in the collar a, secured to the rod a by means of a set-screw, f. The other end of the spring 0 is extended out back so as to reach the connecting-bar d, 011 the side of which a loop of leather, s, is attached by a screw,

through which loop the end of the spring 0 passes with a slight allowance for motion.

It will readily be seen that by pressing dow n on the long end of thespring c the torsion will turn the rod 0. by the collar 0, in which the other end of the spring is held, and cause the finger 0 to press on the bindcrr, and that raising the same end of the spring will remove that pressure. This pressing down and raising of the spring is accomplished at the right time by connecting the long end to the bar (I, as shown in Fig. 1. The motions will be such that as the lathe B moves back forv the shed to be opened and the shuttle to be thrown the bar (I will go over the upper part of its motion (see dotted lines (1) and the pressure of the spring 0 will be taken off the binder r and the shuttle left free to leave the box, and as the shuttle is being received at the other box the bar cl will be on its downward motion and in creasing the pressure of the spring 0 on the binder in that box, and the shuttle will be received with a gradual increasing pressure of the finger on the binder, that will stop it grad ually and prevent any rebound.

The removal of the pressure from the shut tle in this manner is an important advantage, as any friction on the shuttle at that time exerts its retarding power on the long end of the so as to throw the shuttle with sufficient force to enter the box properly and not rebound, and if the speed of the loom slack up alittle the shuttle will not be thrown with force suflicient to enter the box, and if the speedzof the loom is increased beyond the limit the shuttle will be thrown with so much force as to cause it to rebound from the box. In the present ar rangement the change in the speed 'of the loom that varies the force with which the shuttle is thrown also varies somewhat the action of the spring on the binder. This follows from the slight yielding of the parts that move the piekerstick and the springing of that stick under a suddonly-increased impulse, it resultfriction prevents a rebound, so that the bad effects of a change in the speed of the loom are avoided.

1 am aware that a springarm has been attached to the rod that holds the binder-finger and moved by the contact therewith of a pin 'on the pitman or connecting-bar to the crank,

as shown in Patent No.8,984, January 1, 1852, and in English'Patent No. 2,032 of 1857, .for a similar invention, the construction, however, having no coil or spiral spring,'the spring in the arm itself being the only means for avoid- 20 ing a positive pressure on the binder. NVith this construction the spring effect was limited by the shortness of the arm, while the greater length of material in,my coiled spring, which is used as a torsion-spring, affords a greater amount of resiliency and opportunity for obtaining a nicely-graded effect with great durabiiity, which is very important in view of the great number of vibrations performed.

Having thus described my improvements, What I claim as my invention, and desire to secure by Letters Patent, is-

The lathe B, crank-shaft v, and connectingbar d, in combination with the rod a, finger 0, binder 1", and spring '0, the spring being coiled around the rod and having one end attached to the rod, and the other end extended out and connected to the bar' d, substantially as and for the purpose set forth.

SAMUEL S. WALKER. Witnesses:

BENJ. ARNOLD, ZADOC TILLMAN. 

